JP2566194B2 - Manual ultrasonic flaw detector - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manual ultrasonic flaw detector for use in a portion where a flaw cannot be detected by a built-in ultrasonic flaw detector.

[0002]

2. Description of the Related Art In general, various devices (ultrasonic flaw detection devices) for detecting flaws existing inside a subject have been proposed. Many ultrasonic flaw detectors are installed in a factory line and are provided in a suspended manner with respect to an object to be inspected for flaws while sending the object. Further, as a manual flaw detector, it is used for flaw detection in a place where a pipeline is connected after installation of a plant or in a narrow space where an automatic ultrasonic flaw detector cannot be used.

In the conventional manual flaw detector, an operator holds a flaw detector having an ultrasonic probe (hereinafter referred to as a probe) in his hand and performs flaw detection while reciprocating the surface of the subject. Accurate flaw detection requires considerable skill, and often depends on the individual ability of the operator to make flaw detection errors depending on how the flaw detector is moved.

[0004]

That is, in the case of manual flaw detection, an operator moves the flaw detector back and forth while sliding on the surface of the subject to find the flaw. There are places where it is difficult to move the flaw detector back and forth,
There is a risk of overlooking the location of the desired wound.
Further, even when a flaw detection is performed on a flat object, there is a problem that reliability is lacked because it depends on the feed of the operator's hand.

In view of the above situation, the present invention automatically moves the probe that reciprocates on the surface of the subject in the orthogonal direction in accordance with the moving speed of the gripping and supporting machine body, so that it depends on the individual ability of the operator. It is an object of the present invention to provide a manual ultrasonic flaw detector that solves the above problems by eliminating the above problems.

[0006]

SUMMARY OF THE INVENTION According to the present invention, a rotating wheel for traveling on a surface to be inspected is arranged at the lower ends of four sides of a support body provided with a handle, and the rotation amount of one of the rotating wheels is passed through a belt. To the rotary encoder, and the rotary encoder
The rotation amount of the pulse motor is controlled in accordance with the output of the pulse motor, and the rolling ball screw shaft mounted on the support machine interlocking with the pulse motor is screwed into the probe holding mechanism with the probe protruding at the lower end to support the probe. It reciprocates at an arbitrary speed according to the movement of the aircraft.

[0007]

As described above, the probe that reciprocates in the direction perpendicular to the surface of the subject has a structure in which the rotation of a predetermined rotation wheel among the rotation wheels is simply changed by simply sliding the rotation wheels arranged in four directions. The rotation amount is pulsed by being transmitted to the rotary encoder through the pulse encoder, the pulse motor is driven by this pulse to rotate the rolling ball screw shaft by a predetermined amount, and the probe holding mechanism screwed onto the rolling ball screw shaft is covered. Since the scanning feed is performed so as to reciprocate in a direction perpendicular to the moving direction with respect to the sample surface, the probe provided at the lower end of the probe holding mechanism accurately detects the sample.

[0008]

The present invention will be described below with reference to the drawings of the embodiments. Reference numeral 1 denotes a support body in which a handle 2 is provided at the center of the upper part, and a rotating wheel 4 is provided on each leg 3 protruding from the lower ends of the four sides.
The pulley 5 provided on the pulley 5 provided at the end of the supporting shaft 4a of each rotating wheel 4 is provided with the pulley 8 provided on the rotating shaft 7a of the rotary encoder 7 arranged on one side of the upper portion of the support body 1.
A pulse motor 9 for transmitting rotation by applying a pulse signal to the rotary encoder 7 and rotating the pulse encoder 9 on the opposite side of the support body 1.
For supporting both ends of the rolling ball screw shaft 11 interlocked through a toothed belt 10 to the pulse motor 9 to the support body 1 side. This is the rolling ball screw shaft 11 screwed to the top of the probe supporting mechanism 13 digits attach the known probe 12 at the lower end, configuration and manual ultrasonic testing apparatus 14 in these overall configuration
To achieve .

This operation will be described next. First, this manual operation is performed.
When using the ultrasonic diagnostic equipment 14, the handle 2 at the center of the upper part is grasped and lifted, and the rotary wheels 4 arranged at the lower end four sides are placed on the upper surface of a predetermined subject A. Here, if the handle 2 is pushed forward, the ultrasonic flaw detector 14 will move forward by rolling the four rotating wheels 4 arranged at the lower ends of the four directions on the surface of the subject A (of course, set of ultrasonic testing apparatus 14 allowed to position the rotation wheel 4 in earthenware pots by rolling in the direction of movement).

Thus, if the four rotary wheels 4 rotate,
The rotation amount of one of the rotating wheels 4 causes the rotary encoder 7 disposed above the support body 1 to rotate via the toothed belt 6, and the rotation amount of this shaft is converted into a digital amount to output a pulse output. , own the pulse motor 9 in this pulse output
Rotate a fixed amount . The rotation of the pulse motor 9 is transmitted to the rolling ball screw shaft 11 via the toothed belt 10 and is screwed onto the rolling ball screw shaft 11 to provide a probe support mechanism 13.
Are appropriately reciprocated in this axial direction (see FIG. 4). Therefore, the probe 12 protruding from the lower end of the probe support mechanism 13 and contacting the subject A with a predetermined pressure such as a spring pressure (not shown) substantially makes a zigzag scan as shown in FIG. By doing so, scanning feed is performed.

In this case, the scanning speed of the probe 12 depends on the rotation amount of the rotary wheel 4 of the support body 1 of the rotary encoder 7 .
Since the pulse motor 9 is controlled according to the output, the scanning feed is synchronized with the rotation speed of the rotating wheel 4 and reliable scanning feed is performed. That is, since the rotary encoder 7 controls the pulse motor 9 to control the rotation amount of the rotating wheel 4 and the rotation amount of the rolling ball screw shaft 11 is arbitrarily controlled, flaw detection in the subject A can be reliably performed.

[0012]

As described above, in the manual ultrasonic flaw detector of the present invention, the support body having the rotating wheels arranged in four directions, the rotary encoder that receives the amount of rotation of the rotating wheels, and the pulse signal of the pulse motor Since the rotation speed is controlled and the rolling ball screw shaft that suspends the probe is rotated, simply by placing the rotating wheel on the subject surface and moving it appropriately, the probe can be easily and surely attached to the subject surface. It can reciprocate at right angles, can perform scanning feed, can perform accurate flaw detection without requiring skill, does not cause flaw detection, and can be highly reliable inspection. In addition, the apparatus of the present invention has a handle at the upper center, and the rotary encoder and the pulse motor are arranged on the left and right, so that the balance of the machine body is good, and the apparatus is compact and optimal for manual operation.

[Brief description of drawings]

FIG. 1 is a schematic front view of a manual ultrasonic flaw detector according to an embodiment of the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a plan view of the same.

FIG. 4 is an explanatory diagram of reciprocating movement of a probe with respect to a rolling ball screw shaft.

FIG. 5 is an explanatory diagram of the same scanning feed.

[Explanation of symbols]

 1 Support Machine 2 Handle 4 Rotating Wheel 6 Belt 7 Rotary Encoder 9 Pulse Motor 11 Rolling Ball Screw Shaft 12 Probe 13 Probe Support Mechanism

Claims (1)

(57) [Claims] 1. A rotary wheel for traveling on a surface to be inspected is arranged at four lower ends of a support machine body provided with a handle, and the rotation amount of one of the rotary wheels is transmitted to a rotary encoder via a belt. The amount of rotation of the pulse motor is controlled according to the output of the rotary encoder, and a probe holding mechanism having a probe at the lower end is screwed onto the rolling ball screw shaft mounted on a support body interlocking with the pulse motor, A manual ultrasonic flaw detector, which reciprocates at an arbitrary speed according to the movement of the support body.